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1 /* |
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2 * Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of the License "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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15 * |
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16 */ |
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17 |
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18 |
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19 |
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20 |
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21 /** |
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22 @file |
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23 @publishedPartner |
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24 @released |
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25 */ |
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26 |
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27 #ifndef __PKCS7_DIGEST_INFO_H__ |
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28 #define __PKCS7_DIGEST_INFO_H__ |
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29 |
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30 #include <e32base.h> |
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31 #include <x509cert.h> |
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32 #include <signed.h> |
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33 #include <asn1dec.h> |
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34 |
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35 /** |
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36 Provides the means to decode PKCS#7 encoded DigestInfo Structure. |
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37 */ |
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38 class CPKCS7DigestInfo : public CBase |
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39 { |
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40 public: |
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41 /** |
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42 Creates a new PKCS#7 DigestInfo object. |
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43 @param aRawData contains a PKCS#7 DigestInfo Structure |
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44 @return A pointer to the newly allocated object. |
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45 @leave KErrArgument if digestAlgorithm and digest is not present. |
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46 @leave KErrNotSupported if algorithm is other than MD2, MD5 and SHA1. |
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47 */ |
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48 IMPORT_C static CPKCS7DigestInfo* NewL(const TDesC8& aRawData); |
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49 |
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50 /** |
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51 An Algorithm present DigestAlgorithmIdentifier. |
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52 @return The enum which identifies the type of Algorithm |
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53 used to obtain the hash. |
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54 */ |
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55 IMPORT_C TAlgorithmId Algorithm() const; |
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56 |
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57 /** |
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58 Encoded Parameters present in the DigestAlgorithmIdentifier. |
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59 The client has to check for data length. It is 0 in case there are no EncodedParams |
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60 @return The Encoded Parameters which is in the DigestAlgorithmIdentifier. |
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61 */ |
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62 IMPORT_C const TPtrC8& EncodedParams() const; |
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63 |
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64 /** |
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65 The Digest which is in the DigestInfo. |
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66 @return The Digest which is in the DigestInfo and is an Octet String. |
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67 */ |
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68 IMPORT_C const TDesC8& Digest() const; |
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69 |
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70 /** |
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71 Destructor. |
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72 */ |
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73 virtual ~CPKCS7DigestInfo(); |
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74 |
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75 private: |
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76 /** |
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77 Constructor. |
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78 */ |
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79 CPKCS7DigestInfo(); |
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80 |
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81 /** |
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82 Copy Constructor. |
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83 @param aDigestInfo A CPKCS7DigestInfo object. |
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84 */ |
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85 CPKCS7DigestInfo(const CPKCS7DigestInfo& aDigestInfo); |
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86 |
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87 /** |
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88 Assignment operator. |
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89 @param aDigestInfo A CPKCS7DigestInfo object. |
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90 @return A reference to CPKCS7DigestInfo class. |
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91 */ |
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92 CPKCS7DigestInfo& operator=(const CPKCS7DigestInfo& aDigestInfo); |
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93 |
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94 /** |
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95 Decodes the given ASN1 DigestInfo. Below is the ASN1 syntax |
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96 |
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97 DigestInfo ::= SEQUENCE |
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98 { |
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99 digestAlgorithm DigestAlgorithmIdentifier, |
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100 digest Digest |
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101 } |
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102 Digest ::= OCTET String |
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103 DigestAlgorithmIdentifier ::= AlgorithmIdentifier |
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104 AlgorithmIdentifier ::= SEQUENCE |
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105 { |
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106 algorithm ALGORITHM.&id({SupportedAlgorithms}), |
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107 parameters ALGORITHM.&Type({SupportedAlgorithms}{@ algorithm}) OPTIONAL |
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108 } |
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109 |
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110 @param aRawData A descriptor containing the PKCS7 DigestInfo Sequence. |
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111 @leave KErrArgument if digestAlgorithm and digest is not present. |
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112 @leave KErrNotSupported if algorithm is other than MD2, MD5 and SHA1. |
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113 @see TASN1DecGeneric, CX509AlgorithmIdentifier. |
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114 */ |
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115 void ConstructL(const TDesC8& aRawData); |
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116 |
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117 private: |
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118 /** |
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119 The object identifier which identifies the message-digest algorithm. |
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120 A message-digest algorithm maps an octet string (the message) to |
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121 another octet string (the message digest) |
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122 */ |
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123 TAlgorithmId iAlgorithmId; |
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124 |
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125 /** Encoded Parameters which is in the DigestAlgorithmIdentifier */ |
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126 TPtrC8 iEncodedParams; |
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127 |
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128 /** |
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129 The Digest is present in the DigestInfo. |
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130 It is the result of the message-digesting process |
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131 */ |
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132 TPtrC8 iDigest; |
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133 }; |
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134 |
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135 #endif //__PKCS7_DIGEST_INFO_H__ |